<?php

// 定义常量
defined('YII_DEBUG') or define('YII_DEBUG', true);
defined('YII_ENV') or define('YII_ENV', 'dev');
defined('YII_ENV_DEV') or define('YII_ENV_DEV', YII_ENV === 'dev');

// 模拟Yii类和应用实例
class Yii {
    public static $app;
    
    public static function powered() {
        return 'Powered by Yii Framework';
    }
    
    public static function getVersion() {
        return '2.0.0';
    }
}

// 模拟应用类
namespace yii\web {
    class Application {
        public $language = 'zh-CN';
        public $charset = 'UTF-8';
        public $homeUrl = '/';
        
        public function __construct($config) {
            // 初始化应用
            Yii::$app = $this;
        }
        
        public function run() {
            echo "应用已启动";
        }
    }
}

// 模拟控制器类
namespace yii\web {
    class Controller {
        public $layout = 'main';
        public $title;
        public $params = [];
        
        public function render($view, $params = []) {
            return "渲染视图: {$view}";
        }
    }
}

// 模拟过滤器类
namespace yii\filters {
    class AccessControl {
        public static function className() {
            return 'yii\\filters\\AccessControl';
        }
    }
}

// 模拟助手类
namespace yii\helpers {
    class Html {
        public static function encode($content) {
            return htmlspecialchars($content);
        }
        
        public static function a($text, $url = null, $options = []) {
            return "<a href='{$url}'>{$text}</a>";
        }
        
        public static function submitButton($text, $options = []) {
            return "<button type='submit'>{$text}</button>";
        }
    }
}

// 模拟Bootstrap组件
namespace yii\bootstrap {
    class Nav {
        public static function widget($config) {
            return "导航菜单";
        }
    }
    
    class NavBar {
        public static function begin($config) {
            echo "导航栏开始";
        }
        
        public static function end() {
            echo "导航栏结束";
        }
    }
}

// 模拟小部件
namespace yii\widgets {
    class Breadcrumbs {
        public static function widget($config) {
            return "面包屑导航";
        }
    }
    
    class ActiveForm {
        public static function begin($options = []) {
            echo "<form>";
            return new self();
        }
        
        public static function end() {
            echo "</form>";
        }
        
        public function field($model, $attribute) {
            return "表单字段: {$attribute}";
        }
    }
    
    class DetailView {
        public static function widget($config) {
            return "详情视图";
        }
    }
}

// 模拟网格组件
namespace yii\grid {
    class GridView {
        public static function widget($config) {
            return "网格视图";
        }
    }
    
    class SerialColumn {}
    class ActionColumn {}
}

// 模拟数据提供者
namespace yii\data {
    class ActiveDataProvider {
        public function __construct($config) {
            // 初始化数据提供者
        }
    }
}

// 模拟过滤器
namespace yii\filters {
    class VerbFilter {
        public static function className() {
            return 'yii\\filters\\VerbFilter';
        }
    }
}

// 模拟异常类
namespace yii\web {
    class NotFoundHttpException extends \Exception {
        public function __construct($message = null, $code = 0, \Exception $previous = null) {
            parent::__construct($message ?: '请求的页面不存在。', $code, $previous);
        }
    }
    
    class ErrorAction {
        public function __construct($id, $controller, $config = []) {
            // 初始化错误动作
        }
    }
}